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Fan get max speed when macbook pro is waking up from sleep
Posted: 27 Aug 2013, 01:42
by Howard
Hi,
Every time my macbook pro is waking up from sleep, the fan will reach it's max speed and produce big noise although the temperature is not high. It seems to be a bug of Fan Control.
Regards,Howard.
Re: Fan get max speed when macbook pro is waking up from sleep
Posted: 27 Aug 2013, 08:23
by Steven
It's normal behavior of any MacBook Pro, the fan is rotated to a MAX speed for a second after waking from sleep. You can try uninstalling MFC and see that this behavior remains.
Re: Fan get max speed when macbook pro is waking up from sleep
Posted: 29 Aug 2013, 00:39
by Howard
Steven wrote:It's normal behavior of any MacBook Pro, the fan is rotated to a MAX speed for a second after waking from sleep. You can try uninstalling MFC and see that this behavior remains.
That is not true. I tested two policy as following.
1) Set Fan Control to use 'Automatic(controlled by system)'
2) Set Fan control to use 'Sensor-based value' with option 'CPU core 0' starting from 40C and max is 75C
After set the policy, I make the macbook sleep then wake it up. For policy 1, the fan seed is 2145rpm and the temperature 53C. For policy 2, the fan speed is 8123rpm and the temperature is 43C.
As you can see, when macbook pro wakes up from sleep, the fan speed will reach it's max value unless the system default is used.
Re: Fan get max speed when macbook pro is waking up from sleep
Posted: 29 Aug 2013, 11:42
by Steven
Please post screenshots of the app:
- main window with fan speed 8123 rpm
- fan control dialog where you set it's rotation based 'CPU core 0' starting from 40C and max is 75C
When you wake, and fan is at MAX, does it remain at the same speed forever?
Re: Fan get max speed when macbook pro is waking up from sleep
Posted: 29 Aug 2013, 12:49
by Howard
1. Fan speed with system default policy
- b830f3a8e5323ceda4de565730fa15b0.jpeg (8.64 KiB) Viewed 24800 times
2. Change the policy
- c98bf2f5984b2466b874c5870b4fecba.jpeg (98.6 KiB) Viewed 24800 times
3. Fan speed with above policy. The max speed will exist 2s then come back to normal
- 5647fe4023d23f0ff1f1b59c36688ee4.jpeg (8.43 KiB) Viewed 24800 times
Re: Fan get max speed when macbook pro is waking up from sleep
Posted: 29 Aug 2013, 12:52
by Steven
thank you very much. Main Window screenshot as well please.
Does it actually spin to 8123 rpm or only display this value?
Re: Fan get max speed when macbook pro is waking up from sleep
Posted: 29 Aug 2013, 13:32
by Howard
it actually spin to 8123 rpm and generate a big noise. It remains about 2 seconds then come back to normal.
The full screenshot is a little big (3M) and I failed to upload it. Could you pm me your email?
Re: Fan get max speed when macbook pro is waking up from sleep
Posted: 29 Aug 2013, 13:36
by Steven
PM Sent, thank you
Re: Fan get max speed when macbook pro is waking up from sleep
Posted: 29 Aug 2013, 13:50
by Steven
Received. Noticed some issues:
- misusing of MFC: you shouldn't set both fans to cool only CPU. Check which fan cools CPU manually (I'm not aware of this information on MacPro retina). The other fan is probably for cooling GPU
- I'd also say that 75 is very low value for maximum CPU TEMP. I guess that max temp is about 90-95C for this type of processor
- please update to version 1.1.0.
- one should disable iStatMenus fan controlling if set when using Macs Fan Control
Re: Fan get max speed when macbook pro is waking up from sleep
Posted: 05 Sep 2013, 18:43
by Steven
I've reproduced the issue, it will be fixed in 1.1.1
Re: Fan get max speed when macbook pro is waking up from sleep
Posted: 06 Sep 2013, 20:27
by Steven
Fixed in 1.1.1